Question

how to find the missing sides of triangle for class 5​

Answer 1

Answer:

If perimeter is given then,

• If the given triangle is equilateral, then all sides are equal. So, just divide the perimeter given in the question by 3. So, $\frac{p}{3} = x$

• If the given triangle is isosceles, then any 2 sides are equal - So, add both sides (taken as x) and add the last unknown unequal side. So you would get the perimeter of the triangle as $p = 2x + y$. For this case, the question must relate the last side with any feature of the triangle (such as area, perimeter, sides etc.) so to find the missing sides.

• If the given triangle is scalene, then subtract the perimeter with any side so as to derive the sum of the other two sides (or) subtract the perimeter of the triangle with the sum of any two sides so as to gain the length of the last side.

Answer 2

Answer:

Step-by-step explanation:

If perimeter is given then,

If the given triangle is equilateral, then all sides are equal. So, just divide the perimeter given in the question by 3. So,  

If the given triangle is isosceles, then any 2 sides are equal - So, add both sides (taken as x) and add the last unknown unequal side. So you would get the perimeter of the triangle as . For this case, the question must relate the last side with any feature of the triangle (such as area, perimeter, sides etc.) so to find the missing sides.

If the given triangle is scalene, then subtract the perimeter with any side so as to derive the sum of the other two sides (or) subtract the perimeter of the triangle with the sum of any two sides so as to gain the length of the last side.